Comparison

Gravity Machine vs Delay Line

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Gravity Machine

Create music by manipulating a miniature solar system. Fling orbs that bounce off walls, generating notes based on physics and chosen scales. Customize worlds, sounds, and tunings for unique generative compositions.

Highlights
  • Generative music creation
  • Physics-based orb interactions
  • Customizable scales and tunings
  • Multiple world shapes
  • AUv3 and standalone modes
  • MIDI output
Features
Read full description

A tiny solar system that plays piano. Four orbs, a gravity well, and walls that ring like bells. Fling an orb and it falls, ricochets, and plays notes. Where it hits a wall decides what it plays; the physics decide when. You don't write the music. You build a small world and curate what it sings. Gravity is a touch instrument first. Grab an orb and it follows your finger; let go and the throw becomes its velocity. Drag the gravity well and every orbit in the room bends. Set Pulse and the well breathes in time with the tempo, so chaos starts keeping a schedule. EVERYTHING LANDS IN KEY Every impact point along the boundary maps to a note of the current scale, low at one end, high at the other. Pick from 16 scales and 11 tuning systems (12-TET, just intonation, maqam, shruti and more). The scale strip along the bottom is a key-change timeline: tap a segment, change the key, and the whole world modulates on the bar. EIGHT WORLDS TO BOUNCE IN Rectangle, circle, triangle, hexagon, pentagon, octagon, diamond, star. Sharp corners ricochet hard and play jagged. Round shapes glide and play smooth. SOUND A 16-voice pluck engine through a double-bass body and reverb. Octave, key range, quantize from 1/32 to 1/2, orb-to-orb collisions on or off. Presets to start from, themes for the visuals. AUv3 AND STANDALONE Use Gravity full-screen as a standalone instrument, or load it as an AUv3 in GarageBand, AUM, Logic Pro, Cubasis, Loopy Pro and any other Audio Unit host. Each orb has its own MIDI channel, so Gravity can drive other instruments in your host. ONE PRICE No account, no ads, no in-app purchases, no data collected. Buy it once and it's yours. The same engine ships as a VST3 and AU plugin for Windows and macOS at touchmachines.com.

About

Delay Line

This audio effect app offers a high-quality digital delay with smooth parameter control for musical echoes. It's designed to add depth and space to your sound without unwanted noise.

Highlights
  • High-quality digital delay
  • Smooth parameter interpolation
  • Feedback control
  • Musical echoes
  • Linear interpolation for delay time
  • Comprehensive parameter smoothing
Features
Read full description

A high-quality digital delay effect with smooth parameter interpolation and feedback control. This delay provides clean, musical echoes perfect for adding depth and space to your audio. The delay uses linear interpolation for smooth delay time changes and includes comprehensive parameter smoothing to eliminate zipper noise during real-time parameter adjustments.

Screenshots

Gravity Machine1 screens
Delay Line4 screens

Verdict

The call

The clearest difference is price: Delay Line at $1.99 against Gravity Machine's $9.99. Gravity Machine's advantage is iOS requirement (15.0 vs 17.0). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Gravity Machine costs $9.99 and Delay Line $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Gravity Machine against 5.0 for Delay Line. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Scorecard2 real differences · 7 level
Gravity Machine versus Delay Line: the parameters behind the verdict, then further details
ParameterGravity MachineDelay Line
Price$9.99$1.99 — better
Rating5.0 (1 ratings)5.0 (2 ratings)
Number of ratings12 — better
Update frequencyWeekly—
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size13 MB7 MB
Age rating4+4+
DeveloperTouchmachinesCallback Audio, LLC

Customer experience

Gravity Machine

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Delay Line

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Gravity Machine

No in-app purchases

None

Delay Line

No in-app purchases

Questions

Is Gravity Machine free?
Gravity Machine costs $9.99, with no in-app purchases.
Is Delay Line free?
Delay Line costs $1.99, with no in-app purchases.
Which has better reviews, Gravity Machine or Delay Line?
Gravity Machine and Delay Line are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do Gravity Machine or Delay Line have ads?
Neither Gravity Machine nor Delay Line shows ads.

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